Include chaosvpn.conf template for OpenBSD.

Thanks to farhaven and his
https://github.com/farhaven/net-chaosvpn/blob/master/files/chaosvpn.conf
chaosvpn.conf.openbsd: Include latest changes from linux chaosvpn.conf
and change a comment.
Merge branch 'master' of github.com:ryd/chaosvpn